Comment by brewtide

You can also install AdGuard home as a home-assistant add-on, and then configure your router to hand that IP out as the network DNS server -- so all of your network traffic is ad blocking as soon as it hits your wifi. (like a pihole).

It's pretty slick, highly recommend. (Also super useful to see what devices are reaching out to where and how frequently, custom block lists, custom local DNS entries, etc).